Pinning-out machine for drill-steels



n. H. lw|LHELM. PINNING-OUT MACHINE FOR DRILL SITEELS.

APPLICATION FILED IAYIT, 199.

1,370,251.. Patented'mr. 1 1921.

. INVENTOH R. H. WILHELM.

PlNNlNG-OUT MACHINE FOR DRILL STEELS.

APPLICATION FILED IIA-YI?, 1919.

I "1,370,25 1 Patented Mar. 1,1921.

3 SHEETS-SHEET 2- IN VEN TH /y M Tron/vn R. H. WILHELM.

PINNING0UI MACHINE FOR DRILL SIEL-ILS.

APPLICATION FILED MAY 17l |919.

1,370,251 Patented Mar. 1,1921

INV EN TOR.

UNITED STATES RUSSELL E. WILHELM, OE' EASTON, PENNSYLVANIA, ASSIGNOR T0INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A

PATENT OFFICE.

CORPORATION OF NEW JERSEY.'

Specification of Letters Patent.

Patented Mar. 1, 1921.

Application led May 17, 1919. Serial No. 297,892.

To aZZ 'whom it may concern.'

Be it known that I, RUssnLL H. VILHELM, a citizen of the United States,residing at Easton, in the county of Northampton and State ofPennsylvania, have invented a certain new and useful Improvement inPinning-Out Machines for Drill-Steels, of which the following is aspecification.

This invention relates to a pinning out machine for drill steels.

The objects of the present invention are to provide a machine in which adrill steel may be securely clamped in position and a pin forciblypushed into the central hole with which this class of drill steel isprovided, in order to clear the hole after the forging of either the bitor the lug end of the steel has been completed. Particularly, it is anobject of the present invention to control the elements forming thispinning out machine by means of a single valve which may be operated bya single conveniently mounted handle; movement of the handle in theforward direction first closing the jaw members of the vise, a continuedmovement causing the pin to be pushed 'forwardly. A slight rearwardmovement of the handle from this extreme forward position, causes'thepin to be pulled out of the steel and a continued movement rearwardly ofthe handle causes the jaw members ofthe vise to open and release thedrill steel.

A further object of the invention is to convey'the fluid exhausted fromone of the cylinders tothe point of the reciprocable pin to prevent thepin from becoming overheated.

With these and other objects in view my invention consists in thefeatures of construction and operation set forth in the followingspecification.

In the figures of the drawing annexed hereto:

` Figure 1 shows a front end view of the complete pinning out tool,parts being shown in section at one side to more clearly illustrate theconstruction.

Fig. 2 a side view of the complete machine, parts being shown insection.

Figs. 3 to 8 show diagrammatically the position of the valve assumedwhen the handle is in its differentoperating positions.

Referring more particularly to the figures have a movement sufficient toallow the maximum size drill steel ordinarily used to be placed betweenthem and securely grasped. The jaw members 6 and 7 are operated to graspthe drill steel by means of a toggle mechanism comprising arms 8 and 9adjoining and pivotally connected to the blocks in which the jaw members6 Yand 7 are fitted by means of suitable pins 10 and 11. Pivoted aboutpins 14 and 15 lo cated at either side of the machine in the body member2 are arms 16 and 17. The upper ends of arms 16 and 17 join respectivelythe arms 9 and S and are attached thereto by means of pins 18 and 19.The

vlower ends of the arms 16 and 17 are provided` with suitable holesthrough which extendk pins 20 and 21 to which arms 22 and 23 areattached. Arms 22 and 23 intercept each other at their lower ends andare pivotally Vattached to a pin 25 secured in Aa cross head 26 at theupper end of piston rod 27. At the lower end of piston rod 27 is locateda piston 28 operating within a' cylinder 29, the piston rod 27 extendingthrough a suitable stuffing box 29A. Cylinder 29 is supplied with motivefluid under pressure at points above and below the piston 28 by means ofpipes 30 and 31, air being admitted to these pipes in accordance withmovement of a valve 32, the movement of which will be more clearlydescribed later. With the piston in its lowermost position the vise jawmembers 6 and 7 are in their open position, movement upwardly of thepiston 28 closing the members 6 and 7 tightly about the drill steel.

Vithin the cylinder 4 mounted at the rear end of body member 2 a piston36 operates, carrying therewith a piston rod 37 at the forward end ofwhich is secured a pin 5 by any suitable means as shown at 38. The

pin is in its rearmost position as s hown in 32A and another 32B Fig. 2.Fluid pressure is admitted from the valve chamber 46 in one position ofvalve 32 to point 47 and is emitted through an orifce 43 thus comingdirectly in contact with the pin 5 for the purpose of maintaining thepin 5 at a low temperature and preventing it from becoming heated to anunsafe degree. Thishas the effect of rapidly cooling the pin 5 which mayhave become greatly heated in being thrust forwardly into the drillsteel, which when being pinned out 1s -at a red heat.

The valve 32 as shown made up of two spacedpheadsone at its rear endshown at separated from the first head 32A'by a reduced neck portion 32Cas shown in Figs. 3 to 3. lt is obvious however that this valve may beof any suitable form.

V6Y andy 7 of vise 3.

Referring now to Figs. 3 to 3 the valve chamber 46 is showndiagrammatically inV which operates valve 32. The supply or moe tivefluid for the various parts of the pinning out machine is shown at 50',this may be of any form, the one shown comprising a conduit 50 inconnection with the valve chamber 46Y through ports or openings 60. Forconvenience in Figs. 3V to 8 the ports 60 are not shown. -It will beseen that with the valve in the position shown inV Fig. 3 a supplv toany part of the mechanism is cut o Y Y The first movement of the valve32 is rearwardly or to the right as shown in Figs. 3 to 8 to theposition shown in Fig. 4. This opens supply port 50 and admits motivefluid to ports 40 and 30, thus holding the pin in itsrearmost position,and forcing pis ton 28 downwardly to open the jaw members Y Acontinuedrrrearward movement of valve 32 admits motive fluid to the portand pipe 31 which has the eect of raising the piston 28 within cylinder29 and closing the jaw members 6 and 7 very firmly about the drillsteel. Y This position of the valve is shown in Fig. 5.

The extreme rearward position of the valve 32 is shown in Fig'. 6 inwhich position port 4l is opened admitting pressure to the rear ofpiston 36 and pushing thepin forwardly into the drill steel inserted inthe vise 3. In this position also the port 40 as well as port 30 areopened to the exhaust through the forward end 61 of the valve chamber 46so that the pressure is released from the forward and upper ends ofcylinders 4 and 29. A forward movement of valve 32 from the positionshown in Fig. 6 opens communication between the port 4l and the rear endof the valve chamber 46 as shown in Fig. 7, permitting pressure in rearof piston 36 to be exhausted through pipe or conduit 45 andsimultaneously opens communication between the supply port 50 and port40 thus pulling the pin 5 rearwardly.Y The positionof valve 32 showninFig. 8 permits fluid to pass into port 30 thus opening the jaw members 6and 7 of the vise 3, the cycle of operation of the machine beingcompleted by a further forward movement of valve 32 in which the valveis in the position shown in Fig. 3.r

In order to conveniently operate the valve 32 the valve stem 63 iscoupled to a reach arm 64 by means of any suitable coupling shown at 65,the reach arm 64 extending forwardly through the body member 2. At theforward end of the arm 64 a coupling 66 is provided, connecting the arm64 with a handle lever 67 through link .68 and having a handle 69extending upwardly conveniently located to be Vgrasped by the workman.If

desired two handles 69 may be provided symmetrically disposed on eitherside of the center of the machine. The valve 32 is held firmly lin itsclosed position by means of spring 70 pressing against the coupling 66.

It is understood that the present showing and description disclose onlyone specific embodiment ofmy present invention, and thatV other formsand modifications are included within the spirit and scope thereof, asexpressed in the appended claims:

What I claim is: V

1. In a pinning outv machine for drill steels, in combination, a visehavinga plurality ofV movable centering jaws opened and closed by meansof fluid pressure, a reciprocable pin mounted to move forwardly. andbackwardly in relation tosaid j aw members, fluid operated meansforpushing said reciprocable pin forwardly and pulling said Y pinrearwardly and controlling means comprising a single valve forcausing'the jaws to close and clamp the drill steel with its axis inalinement with the axis of the pin Y before the pin is pushed into thedrill steel.

2. In a machine for forcing a pin into and out of a drill steel, thecombination of a vise having jaw'members, toggle levers operating thejaw members Aof said vise, a pin movable in alinement with the axis ofsaid jaw members, and means including a valve and cylinders andpistonsoperatively connected to first actuate the toggle members andclosey the jaw members and then push the pin forwardly, reversing themovement of said valve causing reversal ofthe pistons and iirst pullingthe pin out of the drill steel and then opening the jaw members of saidvise.

3. In a pinning out machine for drill ing from the pin operating meansto the forward end of said pin, and means to force motive fluid fromsaid pin operating means 10 through said conduit to cool said pin.

In testimony whereof, I have hereunto set m hand.

y RUSSELL H. WILHELM.

